hto app for iPhone and iPad

4.0 ( 1680 ratings )

Education
Developer: Marcus Whiteley

Free

Current version: 1.3, last update: 6 years ago
First release : 29 Nov 2017
App size: 8 Mb

Tap the screen to make counters in the columns. They can be exchanged up and down by selecting and dragging to different columns. Easily add and subtract in a visual manner that really shows how the column method works.